Malicious PDF — malware analysis report

Static analysis result for SHA-256 f428dbf9277ac3a5…

MALICIOUS

PDF

49.0 KB Created: 2020-08-29 17:09:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 828cf475ffd6f984aa341a7c870d1120 SHA-1: 3614db303f48b2e1f530b70ffa15b28f77ee5f70 SHA-256: f428dbf9277ac3a560098c25277638cfda6e90e4977f50f09d5b832a12ed83fa
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on static.usrfiles.com. One of these links, found in the document body, directs to a known malicious redirector at ttraff.com, disguised as a Pokemon guide. This indicates a social engineering attempt to redirect the user to malicious infrastructure.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wix?keyword=pokemon+light+platinum+guide+legendary
    • https://static.usrfiles.com/ugd/49be48_0f851d7b05e04ffba9ed3cbc321b1076.pdf
    • https://static.usrfiles.com/ugd/b8c837_461927c5a3114e60b93e5540d402a421.pdf
    • https://static.usrfiles.com/ugd/b8c837_c3ae09e087aa487a9991ec7759c3ef61.pdf
    • https://static.usrfiles.com/ugd/b8c837_51daf907da9847f090bb1f03e0535f51.pdf
    • https://static.usrfiles.com/ugd/b8c837_94ebdc909c7447589fc4695df380f5fd.pdf
    • https://cdn.shopify.com/s/files/1/0435/2235/9447/files/find_longest_consecutive_sequence_java.pdf
    • https://cdn.shopify.com/s/files/1/0432/5274/4356/files/99945095341.pdf
    • https://cdn.shopify.com/s/files/1/0429/8673/3727/files/98128080894.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4977/files/2226384701.pdf
    • https://cdn.shopify.com/s/files/1/0431/6187/8687/files/xasuvofajarowoxulujuno.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a1b03c3d5de4af4a18b1a427e713107.pdf
    • https://static.usrfiles.com/ugd/32acb1_317a3a49b20b42eba441f0c61617f3be.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e251d56313340988d39db694fd9b73b.pdf
    • https://static.usrfiles.com/ugd/cf14a4_f2819cd47e864b0b8a4a53a749e40127.pdf
    • https://static.usrfiles.com/ugd/b8c837_ff238bc9a5d74139b1572a6204f549ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_1cc25ac370e2448e87dc807402b45e3a.pdf
    • https://static.usrfiles.com/ugd/b8c837_fd55ff76e2d7412887c5dc4db07dd133.pdf
    • https://static.usrfiles.com/ugd/b8c837_663a55f8981a44bc82b73d35778bb442.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000081a8.bin
8bcc200ef205c8c86e3c5aae6db70c50cae6204c901385ebab86ff3b4092d065		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81A8 5364 bytes
font_01_sfnt_off000093c1.bin
27037ac9a48c5c9a8270484c1ce25d9af83dbe102cbcfb1f73d3f1846db4c589		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93C1 10092 bytes

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